How does SkyTrain get power?

Propulsion uses two Linear Induction Motors—straight line versions of the conventional AC rotary electric motor. The motors react with an aluminium-capped steel rail on the guideway to provide motive power. SkyTrain was the first major application of LIM technology to mass transit systems.



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There are permanent magnets in both the rail and the arm that surrounds the train, causing the arm and the train to repel each other and suspend the train.

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Launched in December 1985, SkyTrain is the oldest and one of the longest fully-automated, driverless, rapid transit systems in the world.

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relying purely on magnetic forces However, this new 'Sky Train' system takes electricity out of the equation, using only magnets composed of rare-earth metals that 'create a constant repelling force [which] can lift a train with 88 passengers and keep it floating even without power,' states South China Morning Post.

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Even if the power goes out, levitation forces keeps the train in the air while it is traveling at high speed. The vehicle comes safely to a stop rather than suddenly falling onto the track.

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TransLink's reasons for rejecting an overnight SkyTrain service. The SkyTrains are automated and driverless. In theory, they are the perfect fit for a 24/7 service transit system. But, some parts of its infrastructure are 40 years old and require daily maintenance, most of which is done at night.

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Therefore, in maglev systems, ground supply either energizes the track coils or it supplies the on-board system through magnetic coupling between the track coils and rail car, whereas in on-wheel rail systems, mechanical contacts fulfil this task.

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Disadvantages of Maglev Trains Complications resulting in accidents will usually lead to high human fatalities. Maglev trains are much more expensive to construct than conventional trains because of the high number of superconducting electromagnets and permanent magnets required, which are usually very costly.

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On 22 September 2006, a Transrapid magnetic levitation (or maglev) train collided with a maintenance vehicle near Lathen, Germany, killing 23 people. It was the first fatal accident involving a maglev train.

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Maglev trains are “driven” by the powered guideway. Any two trains traveling the same route cannot catch up and crash into one another because they're all being powered to move at the same speed. Similarly, traditional train derailments that occur because of cornering too quickly can't happen with Maglev.

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If guideway power is lost on the move, the Transrapid is still able to generate levitation down to 10 kilometres per hour (6.2 mph) speed, using the power from onboard batteries.

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Levels of autonomous trains While full driverless autonomy is certainly technically possible, and is applied on various routes worldwide, it still accounts for only a tiny percentage of trains running today. New trains are still being designed and built with fully equipped driver cabins.

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The world's first automated, driverless train has been unveiled in Germany's Hamburg.

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